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[PATCH] sysctl: factor out sysctl_head_next from do_sysctl

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The current logic to walk through the list of sysctl table headers is slightly
painful and implement in a way it cannot be used by code outside sysctl.c

I am in the process of implementing a version of the sysctl proc support that
instead of using the proc generic non-caching monster, just uses the existing
sysctl data structure as backing store for building the dcache entries and for
doing directory reads.  To use the existing data structures however I need a
way to get at them.

[akpm@osdl.org: warning fix]
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Eric W. Biederman 2007-02-14 00:34:11 -08:00 • committed by Linus Torvalds
parent 0b4d414714
commit 805b5d5e06
2 changed files with 47 additions and 17 deletions
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4
include/linux/sysctl.h
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@ -924,6 +924,10 @@ enum
#ifdef __KERNEL__
#include <linux/list.h>
/* For the /proc/sys support */
extern struct ctl_table_header *sysctl_head_next(struct ctl_table_header *prev);
extern void sysctl_head_finish(struct ctl_table_header *prev);
extern void sysctl_init(void);
typedef struct ctl_table ctl_table;